Interaction-Dependent Semantics for Illustrative Volume Rendering

Peter Rautek, Stefan Bruckner, M. Eduard Gröller

Abstract

In traditional illustration the choice of appropriate styles and rendering
techniques is guided by the intention of the artist. For illustrative
volume visualizations it is difficult to specify the mapping between
the 3D data and the visual representation that preserves the intention
of the user. The semantic layers concept establishes this mapping
with a linguistic formulation of rules that directly map data features
to rendering styles. With semantic layers fuzzy logic is used to
evaluate the user defined illustration rules in a preprocessing step.
In this paper we introduce interaction-dependent rules that are evaluated
for each frame and are therefore computationally more expensive.
Enabling interaction-dependent rules, however, allows the use of
a new class of semantics, resulting in more expressive interactive
illustrations. We show that the evaluation of the fuzzy logic can
be done on the graphics hardware enabling the efficient use of interaction-dependent
semantics. Further we introduce the flat rendering mode and discuss
how different rendering parameters are influenced by the rule base.
Our approach provides high quality illustrative volume renderings
at interactive frame rates, guided by the specification of illustration
rules.

Documents and Links

Additional Media

BibTeX

@ARTICLE{Rautek-2008-ISI,
author = {Peter Rautek and Stefan Bruckner and M. Eduard Gr{\"o}ller},
title = {Interaction-Dependent Semantics for Illustrative Volume Rendering},
journal = {Computer Graphics Forum},
year = {2008},
volume = {27},
pages = {847--854},
number = {3},
month = may,
abstract = {In traditional illustration the choice of appropriate styles and rendering
techniques is guided by the intention of the artist. For illustrative
volume visualizations it is difficult to specify the mapping between
the 3D data and the visual representation that preserves the intention
of the user. The semantic layers concept establishes this mapping
with a linguistic formulation of rules that directly map data features
to rendering styles. With semantic layers fuzzy logic is used to
evaluate the user defined illustration rules in a preprocessing step.
In this paper we introduce interaction-dependent rules that are evaluated
for each frame and are therefore computationally more expensive.
Enabling interaction-dependent rules, however, allows the use of
a new class of semantics, resulting in more expressive interactive
illustrations. We show that the evaluation of the fuzzy logic can
be done on the graphics hardware enabling the efficient use of interaction-dependent
semantics. Further we introduce the flat rendering mode and discuss
how different rendering parameters are influenced by the rule base.
Our approach provides high quality illustrative volume renderings
at interactive frame rates, guided by the specification of illustration
rules.},
doi = {10.1111/j.1467-8659.2008.01216.x},
event = {Eurographics/ IEEE-VGTC Symposium on Visualization},
keywords = {volume visualization, illustrative visualization, semantics, interaction},
location = {Eindhoven, The Netherlands},
url = {http://www.cg.tuwien.ac.at/research/publications/2008/Rautek-2008-IDS/}
}